🎯 Ideal Weight Calculator

These formulas (Hamwi, Devine, Robinson, Miller) were developed primarily using Western population data from the 1960s–1980s. They may slightly overestimate ideal weight for South Asian and East Asian users, where lower BMI cutoffs and different body composition norms apply. For users from these backgrounds, consider using the BMI-based healthy range (18.5–23 for South/East Asian populations) alongside these formula estimates, and consult a healthcare professional for personalized targets.

No single formula is universally "most accurate" — they were developed for different clinical contexts. The Devine formula is most widely used in pharmacology. For general health purposes, using the average of all four formulas (as shown in this calculator) provides a reasonable estimate. Body composition matters more than a specific number on the scale.

People with larger bone structure naturally weigh more at the same height. A "large frame" person may have an ideal weight 10% higher than a "small frame" person at the same height. Wrist circumference is often used to estimate frame size: men with wrist > 19cm (7.5 in) = large frame; women with wrist > 17.8cm (7 in) = large frame.

Ideal weight formulas give estimates, not precise targets. Focus on body composition (fat vs muscle ratio), health markers (blood pressure, blood sugar, cholesterol), energy levels, and physical fitness rather than matching a formula's output exactly. A person with more muscle may healthily exceed the "ideal" by 5-10 kg.

Ideal weight is a single number from a formula. Healthy weight range (from BMI 18.5–24.9) spans a wider band. For a 170cm person, the healthy range is roughly 53–72 kg. This acknowledges that health can be maintained across a range of weights, not just at one specific value.